Most of what a devops person does is in fact development but it is of the non value adding variety. Basically a devops person spends the vast majority of their time configuring common off the shelf software, scripting this or that, etc.
A singular matrix is a matrix which has no inverse because its determinant is zero. If you recall, the inverse of a matrix is. 1/ ad-bc multiplied by: [ d -b ] [-c a ] If ad-bc = 0, then the inverse matrix would not exist because 1/0 is undefined, and hence it would be a singular matrix. E.g.
â¢ MATRIX (noun) The noun MATRIX has 5 senses: 1. a rectangular array of elements (or entries) set out by rows and columns. 2. an enclosure within which something originates or develops (from the Latin for womb) 3. the body substance in which tissue cells are embedded. 4. the formative tissue at the base of a nail.